Ventilating and refrigerating apparatus



Dec. 31, 1929.

C. A. MOORE VENTILATING AND R EFRIGERATING APPARATUS Original Filed Aug.15, 1924 2 Sheets-Sheet rzz/erz Z07" (72%77651/7170076 Dec. 31, 1929. c.A. MOORE VENTILATING AND REFRIGERATING APPARATUS 2 Sheets-Sheet 2Original Filed Aug. 15, 1924 Patented Dec. 31, 1929 UNITED STATES PATENTOFFICE CHARLES A. MOORE, OF EDINA, MINNESOTA VENTILATHQ'G ANDBEFBIGERATING APPARATUS Applicationiled August 15,1924, Serial No.732,345. Renewed September 28, 1925.

My invention relates to improvements in ventilating and refrigeratingapparatus.

An object of the invention is to provide an improved apparatus of thepresent nature lxfor chambers for the storage of perishable lading, saidapparatus being adapted to provid e for refrigerated circulation of airwithin a chamber, also ventilated, refrigerated circulation of airtherein, or a combination of the two, both conditions being broughtabout naturally through gravitation.

A further object of the invention is to supply an apparatus, as above,the same being equipped with a fan adapted to augment the efficientlyincrease its capacity in ventilating the room and circulatingrefrigerated air therein.

With the foregoing and other objects in view, which .will appear in thefollowing description, the invention resides in the novel combinationand arrangement of parts and in the details of construction hereinafterdescribed and claimed.

In the drawings, Fig. 1 is an elevational view of an apparatus embodyingmy invention, thesa'me being illustrated as installed in a chamber andhaving parts thereof broken away to disclose internal structure; Fig. 2is a vertical central sectional view taken on the line 2-2 of Fig. 1;Fig. 3 is a plan view ofthe apparatus illustrated in Fig. 1 and Fig. 4is a transverse sectional view taken on the line 4-4 of Fig. 2.

Referring to the drawings, it will be understood that the floor, walland ceiling portions, indicated by the numerals 10, 11 and 12, representa part of a structure forming a chamber A for the storage of perishableconimodities. My improved appliance is installed in such a chamber inthe. manner shown and includes in its construction two main conduits B,C, the former, a conditioning conduit through which fresh air isadmitted to the chamber A, and the latter, an exhaust conduit fordischarging foul air from the chamber. The conduit B comprises acylindrical shell 13 seated at one end thereof on the floor 10 over adrain 14 inthe floor, .said shell being fitted at its upper end withflow of air through the apparatus and thus of the junctions between wall11, communicates with the shell 13 through the cap 15. Thimbles 18 atthe lower 0 margin of the shell 13 are provided with removable caps 19,said thimbles providing for the egress of refrigerated air from theshell 13 into the lower portion of the chamber,

when that is desired. The conduit C is arranged within the conduit B,axially thereof,

an egress pipe 20 being extended from the lower end of said conduit,through the shell Y13 and wall 11 and into the outer air.

A supply duct 21 and a return duct 22 are 7 disposed horizontally alongthe ceiling 12 of the chamber A, the supply duct 21 being slightly lowerthan the return duct 22 and supplied with a port 21 in the lower sidethereof, said port 21 reaching from end to end of said duct 21. Thereturn duct 22 also has a port therein. This port, designated as 22,extends fromend to end of the duct 22, and differing from the port 21",is formed in the upperside of said duct. Said supply duct 21 isconnected with the shell 13 through "the medium of a feed pipe 23 risingfrom the lower margin ofsaid shell and the return duct 22 is connectedwith the upper end of the exhaust conduit C through the drop-pipe 24.Two additional drop-pipes 25, 26 connect said return duct 22 with theingress pipe 17.

Within said ingress pipe 17 and intermediate said drop-pipes 25,

26 therewith, I place a conventional fan or blower 27, the purpose ofwhich will soon appear. The drop-pipes 24, 25'and 26 and ingress pipe 17are respectively "fitted with dampers 24, 25, 26 and 17, as shown.

In use, a suitable refrigeratin medium is circulated through the coiledpipe 16, said W medium serving, primarily, to refri erate V the airwithin the shell 13 and, secon arily, to lower the temperature of theair within the exhaust conduit C.

By removing one or more of the caps 19, opening the valve 26 and'closingthe valves 17 24 and 25 the fan 27 being idle, natural refrigeratedinternal circulation of air within the chamber is attained. Under thiscondition air within the shell 13 is chilled by the refrigerant in thepipe 16, and, thus affected, flows through the open thimble 18 into theroom. Tempered in the chamber, said air rises to the ceiling andentering the port 22 of the duct 22 returns through said duct and thedrop-pipe 26 to the shell 13.

Opening the valves 17 24 results in natural mixed, refrigerated,ventilated, internal circulation. Under this condition it will beunderstood that fresh air is admitted to the shell 13 through theingress pipe 17 and that a part-of the air entering the return duct 22is exhausted into the outer atmosphere through'the drop-pipe 2 1,chilled conduit C and egress pipe 20.

Closing the valve 2o resolves the last mentioned condition into that ofnatural refrigerated ventilation within the room, under which conditionall of the air entering the return duct 22 is exhausted through thedroppipe 24, conduit C and egress pipe 20.

Operation of the fan 17 augments the naturally created conditions abovepointed out, and provides for supplying chilled air to the chamber A atthe top thereof. Upon applying the caps 19 tothe thimbles 18, airpropelled downward through the shell 13 by the fan 17, is led to thesupply duct 21, through the upright feed pipe 23, and directeddownwardly into the chamber A through the port 21 in the underside ofsaid duct 21. The damper 24 according to the adjustment thereof, eitherblocks or permits of the exhaustion of air into the outer atmosphere, asbefore. The damper 26 is closed and the damper 25 opened. WVith saidvfan 17 idle there is no need of returning air past and in contact withit. Therefore, the damper 25 is closed and the damper 26 opened, whenthe appliance is operating naturally. Under force, however, and with thefan 27 rotating it is necessary to admit returning air to the pipe 17 atthe suction side of the fan 27 and to block said air against shortinginto the duct 22 through the drop-pipe 26. The valves 25, 26 for thisreason are adjusted as described, the former being opened and the latterclosed, when the fan 27 is put to use. A

lVhile the feed pipe 23 and supply duct 21 are used in cpnnection withthe fan 27 to deliver chilled air' into the upper portion of the chamberA, it will be understood that such air may be supplied to the lowerportion of the chamber, under pressure of the fan, by

removing one or more of the caps 19 from the thimbles 18.

Changes in the specific form of my invention. as herein disclosed, maybe made within chamber including an upright air conditioning conduit,.an element associated with said conduit for refrigerating air therein,an upright exhaust conduit within said conditioning conduit, an elevatedsupply duct opening downwardly into the chamber, an elevated return ductcommunicating with the chamber along and near the ceiling thereof, avalved ingress pipe leading inwardly from without the chamber to theupper end of the conditioning conduit, said conduit having valvedcommunication at the lower end thereof with the chamber near the floor,a feed pipe leading upward from said lower'end of the conditioningconduit to the supply duct, a valved drop-pipe connecting the returnduct with the upper end of the exhaust conduit, an egress pipe leadingfrom the lower end of the exhaust duct to the outer air, a pair ofspaced, valved drop-pipes connecting said return duct with said ingresspipe, and a fan within said ingress pipe and between the junctions ofsaid spaced drop-pipes with said ingress pipe.

2. The combination with a structure forming a lading chamber, of meanswithin said said element, an elevated supply duct opening downwardlyinto the chamber, an elevated return .duct communicating with thechamber along and near the ceiling there-' inwardly of, an ingress pipeleading from without the chamber to the upper end of the conditioningconduit, a feed pipe leading upward from the lower endof theconditioning conduit to the supply duct, a valved drop-pipe connectingthe return duct with the upper end of the exhaust conduit, an egresspipe leading from the lower end of the exhaust duct to the outer air, afan in the ingress pipe and a valved drop-pipe connecting the returnduct with said ingress pipe at the suction side of said fan.

3. The combination with a structure forming a lading chamber, of meanswithin said chamber including an upright air conditioning conduit, anelement associated with said conduit for refrigerating air therein, anupopening into the chamber, an elevated return duct communicating withthe chamber near the ceiling thereof, a valved ingress pipe leadinginwardly from without the chamber to the upper end of the conditioningconduit, a feed pipe leading upward from the lower end of theconditioning conduit to the supply duct, a valved drop-pipe connectingthe return ductv with the upper end of the exhaust conduit, an egresspipe leading from the lowerend of the exhaust duct to the outer air, apair of spaced, valved drop-pipes connecting said return duct with saidingress pipe, and a fan within said ingress pipe and between thejunctionsofsaid spaced drop-pipes with said ,lngress plpe'. s i 4. Thecombination with a structure forming a lading chamber, of means withinsaid chamber including an upright air conditionj ing conduit, an elementassociated with said conduit for refrigerating air therein, an uprightexhaust conduit, an elevated supply duct opening into the chamber, anelevated return ductcommunicating with near the ceiling thereof, aningress pipe, leading inwardly from without the chamber to the upper endof the conditioning conduit, a feed pipe leading upward from the lowerend of 7,5 the conditioning conduit to the supplyduct, adrop-pipeconnecting the return duct with a "the upper end of the exhaust conduit,an egress pipe leading from the lower end of the exhaust duct to theouter air, and a fan in the so ingress pipe.

a 5. The combination with a structure form? ing a lading chamber, ofmeans within said chamber including an upright air conditioning conduitcommunicatingat its lower end withthe interior of the chamber near thefloor thereof, an element associated with said conduit for refrigeratingair therein, an u right exhaust conduit positioned near the anconditioning conduit and affected by said ele- 40 ment, said exhaustconduit communicating at its lower end with the outer atmosphere, an'air ingress pipe leading from without the chamber into the upper end ofthe conditioning conduit, an elevated, elongated duct communicating withthe chamber along the ceiling thereof, a valved drop-pipe connectingsa1d duct with the upper end of the exhaust the chamber ulating the flowof air through the exhaust conduit.

7. The combination with 'a structure forming a lading chamber, of an.elevated supply duct opening into the chamber, an elevated return ductcommunicating with the chamber near the ceiling thereof, an uprightconduit, a refrigerant container associated therewith for refrigeratingair therein, said conduit communicating at its upper, end with the outerair and at its lowerend with said supply duct, an upright exhaustconduit communicating at its upper end with said return duct and at itslower end with the outer air, and a fan associated with one. of saidconduits for impelling air therethrough and building up a pressurewithin the room for stimulating the flow of air through the otherconduit.

In testimony whereof, I have signed my name to'this specification.

CHARLES A. MOORE.

conduit, and a second valved drop-pipe connecting said duct with theupper end of the conditioning duct.

6 The combination with a structure forming a ladmg' chamber, of anelevated supply duct opening into the chamber, anelevated return ductcommunicating with the interior of the chamber near the ceiling, anupright air conditioning conduit, air refrigerating means associatedtherewith, said conduit oommunica air and atlts lower end with anupright exhaust conduit commumcating at its upper end with, said returnduct and at its lower endwith the outer air, and a fan associated withsaid conditioning conduit for impellmg air therethrough and buildin u anInternal premure within the room for stimat its upper end, with theouter said supply duct, i-

